INSKEEP: Some fans are paying more than $1,000 to sit on top of the Green Monster when the Red Sox play tonight.

COSTNER: Glenn Stout is author of the book "Fenway 1912 "

GLENN STOUT: Because of the age of the stadium, it is very much - and in a very physical way - a shared experience, you know. If somebody on one end of your aisle jumps up in joy, you know, there's going to be a ripple effect all the way down your aisle, because you're crowded so close together.

NEARY: Ken Greenwood has been an usher at Fenway for 45 seasons.

KEN GREENWOOD: Even though they change - make little tweaks here and there, it still seems like it's the same ballpark that I came to as a kid.

INSKEEP: The same right field foul pole, the same Fenway franks, and the same dedicated fans who rise not just for a seventh inning stretch, but also for an eighth inning sing-along.

CROWD: (Singing) Sweet Caroline...

NEARY: And they will sing as the Red Sox play their rivals, the New York Yankees, at Fenway today.

(SOUNDBITE OF SONG, "SWEET CAROLINE")

NEIL DIAMOND: Sweet Caroline, good times never seemed so good. I've been inclined to believe they never would. But...